
var a = document.querySelector("#\\:54 > div.J-J5-Ji.J-JN-M-I-Jm > span")


var downevent = new MouseEvent('mousedown', {

    'view': window,

    'bubbles': false,

    'cancelable': true

  });

var upevent = new MouseEvent('mouseup', {

    'view': window,

    'bubbles': false,

    'cancelable': true

  }); 

var df = function(){
	a.click();
	var d = document.querySelector("#\\:4 > div.D.E.G-atb.PY > div.nH.aqK > div.Cq.aqL > div > div > div.G-Ni.G-aE.J-J5-Ji > div.T-I.J-J5-Ji.nX.T-I-ax7.T-I-Js-Gs.mA.T-I-Zf-aw2")
	d.dispatchEvent(downevent);
	d.dispatchEvent(upevent)
}

var timer = setInterval(function() {

  console.log('start');

  df()

  console.log('end');

}, 12000)

df()

// clearInterval(timer) 想停止的时候执行

